Detail of "

5794-13-8

CAS Number:
5794-13-8
Name:
L(+)-Asparagine monohydrate
Molecular Structure:
Formula:
C₄H₁₀N₂O₄
Molecular Weight:
150.13
Synonyms:
L-Asparagine,hydrate (1:1);Asparagine,monohydrate, L- (8CI);L-Asparagine, monohydrate (9CI);L-Asparagine monohydrate;
EINECS:
200-735-9
Melting Point:
233-235 °C(lit.)
Boiling Point:
438 °C at 760 mmHg
Flash Point:
218.7 °C
Solubility:
30 g/L (20 °C) in water
Appearance:
White crystalline powder
Hazard Symbols:
Xn
Risk Codes:
20/21/22-36/37/38
Safety:
24/25-36-26 Details
AvailableForms:
Powder

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Reference

EPR and optical study of Mn2+ doped L-asparagine monohydrate: All Rights Reserved. EPR and optical study of Mn2+ doped L-asparagine monohydrate. Kripal, Ram; Singh, Pragya (EPR Laboratory, Department of Physics, University of Allahabad, Allahabad, India). Physica B: Condensed Matter (Amsterdam, Netherlands), 387(1-2), 222-226 (English) 2007 Elsevier B. 16397-91-4 and 5794-13-8 are also occured in this study.V. CODEN: PHYBE3. ISSN: 0921-4526. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) Section cross-reference(s): 77 The ESR spectrum of Mn2+-doped L-asparagine monohydrate at 77 K is analyzed and Mn2+ site entered in the lattice is discussed. The values of the zero field parameters providing good fit to the obsd. EPR spectra were detd. The evaluated g, lA, lB, D, E, and a values were 2.0912 ± 0.0002, 98 ± 2 ′ 10-4 cm-1, 91 ± 2 ′ 10-4 cm-1, 299 ± 2 ′ 10-4 cm-1, 99 ± 2 ′ 10-4 cm-1 and -28 ′ 10-4 cm-1, resp. The percentage covalency of the metal-ligand bond is also estd. From the optical absorption at room temp., the distortion in the lattice is suggested. The obsd. bands are assigned as transitions from the 6A1g(S) ground state to various excited quartet states of Mn2+ ion in a cubic cryst. field. The electron repulsion parameters (B and C), crystal field parameter (Dq) and Tree's correction (a) giving good fit to the obsd. optical spectra are evaluated and the values obtained for the parameters are B = 767 cm-1, C = 3032 cm-1, Dq = 750 cm-1, and a = 76 cm-1. .

High-temperature Raman spectroscopy of monohydrated L-asparagine:Cr3+: All Rights Reserved. High-temperature Raman spectroscopy of monohydrated L-asparagine:Cr3+.Several substances are used for example 16065-83-1 and 5794-13-8 which are their cas registry numbers. Bento, I. C. V.; Freire, P. T. C.; Bento, R. R. F.; Lemos, V.; Melo, F. E. A.; Mendes Filho, J.; Pizani, P. S.; Moreno, A. J. D. (Departamento de Fisica, Universidade Federal do Ceara, Fortaleza 60455-970, Brazil). Journal of Raman Spectroscopy, 37(12), 1393-1397 (English) 2006 John Wiley & Sons Ltd. CODEN: JRSPAF. ISSN: 0377-0486. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) Section cross-reference(s): 75 Raman scattering of L-asparagine:Cr3+ was studied over the complete range of wavenumbers at temps. from ambient to ~410 K. A qual. change in the spectrum occurs when the temp. approaches 400 K. In the region of the spectrum corresponding to lattice vibrations of the crystal some bands disappear, as they do in the intermediate range of wavenumbers 200 cm-1 < n < 1000 cm-1, where some new peaks also appear. Aimilar changes also occur in the highest spectral region, for wavenumbers >3000 cm-1, which is assocd. with water mol. vibrations. The changes indicate a modification of the crystal structure with irreversible loss of water mols. during the heating process. .

5794-13-8

L(+)-Asparagine monohydrate

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Reference